What is displayed to call recipients?
What about Residence telephones?
What is Permanent Caller ID Blocking?
When should I selectively block a call?
Is there a charge for using *67 or *82?
Will my line be permanently affected by dialing *67?
Can I use *67 with a toll-free number?
Are there any other times where my number is displayed outside of my control?
Are there any other limitations to blocking Caller ID?
What is displayed to call recipients?
Caller ID displays the following:
- When calling from campus telephone to campus telephone, the 7-digit campus phone number is displayed.
- When calling from a campus telephone to an off-campus telephone, “Unknown Name" + "10-digit number" is displayed on the recipient's phone.
- Incoming calls to a campus phone with CND displays the outside party's 10-digit number (or long distance number).
If you use *67 to block Caller ID:
- the recipient will see nothing or non-descriptive text such as "Private Number" or "Unknown Caller" on their phone depending on the telephone service they use.
Please note that *67 does not work on campus VoIP (Voice-over-Internet-Protocol) telephones.
What is Permanent Caller ID Blocking?
Permanent Caller ID Blocking prevents the caller's campus number from being displayed at all times. This service may be available to the following individuals or agencies:
- victims of domestic abuse
- programs and agencies that provide shelters for victims of domestic abuse
- public safety personnel
- call centre applications
To request Permanent Caller ID Blocking, contact IT Voice Services.
Permanent Caller ID Blocking can be overridden on a per-call basis by dialing *82 first and then the number.
What about Residence telephones?
The landline telephones in Student Residences have Permanent Caller ID Blocking enabled by default to protect the privacy of residents. Outgoing calls made from Student Residence will not have their number displayed. This blocking feature cannot be changed; however students can override it on a per-call basis by first dialing *82 and then the number. Their 10-digit residence telephone number will then be displayed on the recipient's phone for that call only.
When should I use *67?
You should use *67 when you want the privacy and security of not allowing the recipient to know your number. For example, Caller ID Blocking may provide some protection from those who may use your number in a "reverse directory" to obtain more information about you (such as your address). On the other hand, the called party may only answer calls if they know who is calling and may refuse to answer your call.
Is there a charge for using *67 or *82?
No, there is no charge for using *67 or *82. They are free.
Will my line be permanently changed by dialing *67?
No, dialing *67 only blocks Caller ID for the call currently being placed. Afterward, your line will revert back to its original default setting which is to display your number.
Will my number be displayed to on-campus users if I block Caller ID?
No, there is no difference between a call made to an on-campus or an off-campus number. If Caller ID is blocked, your number will not be displayed (see exceptions below).
Can I use *67 with a toll-free number?
No, it's a requirement that your telephone number cannot be blocked when calling 800, 888, or 877 toll-free numbers.
Are there any other times where my number is displayed outside of my control?
Yes, when dialing 911 Emergency Services, the Operator, and Premium Services (1-900, xxx-976-xxxx) numbers, your number will be displayed.
Are there any other limitations to blocking Caller ID?
Caller ID blocking does have the potential to limit the completion of outbound calls to those people subscribing to a Caller ID service known as Anonymous Call Rejection (ACR). It is known as "Block the Blocker" technology because it enables users to program their received calls so those calling with a blocked number are redirected to a recorded announcement stating that the user does not accept calls from blocked numbers.